Ask HN: ToDo app that was posted here a while ago that I need help finding.

Hello HN,<p>I'm looking for a web site app that was posted awhile back here (about 1 year ago?) it was a website that you could login to and create tasks using keyboard shortcuts and you could create sub tasks under each task also using keyboard shortcuts. I remember the site being very simple and clean with a white/grey back ground? And once a task was completed you could check off the task and it will strike the task off with a line in the middle.<p>I also remember the site being a paid service with one project being free and if you wanted to create more ToDo projects it was subscription based.<p>Can anyways help me find this once again and help get re-united? I miss it dearly.<p>Thank you.